No idea man, that's weird. I usually use Purolator PureOne filters (the ones w/ the grippy yellow exterior)
I'm definitely going to switch brands, I'll see if those are in stock, thanks.
Are you sure the old oil filter seal came off? I always check the old one to make sure. It's happened a couple of times on different cars.
Yeah, the old seal came off and was still in the filter, shiny metal on the block and all. On a second inspection after the oil gushed out we discovered that there was about a 1/4" gap between the K&N seal and the block (hand) it wasn't even close...